He should have known the police wouldn't allow it but he didn't.He should have known the police wouldn't allow it_______.A.and he did B.but he didn't C.but he couldn't D.but he had新概念英语第二册中65课的题,为什么选择B项呢?如何

He should have known the police wouldn't allow it but he didn't.He should have known the police wouldn't allow it_______.A.and he did B.but he didn't C.but he couldn't D.but he had新概念英语第二册中65课的题,为什么选择B项呢?如何
He should have known the police wouldn't allow it but he didn't.
He should have known the police wouldn't allow it_______.
A.and he did B.but he didn't C.but he couldn't D.but he had
新概念英语第二册中65课的题,为什么选择B项呢?如何翻译这句话?

He should have known the police wouldn't allow it but he didn't.He should have known the police wouldn't allow it_______.A.and he did B.but he didn't C.but he couldn't D.but he had新概念英语第二册中65课的题,为什么选择B项呢?如何
从should have done和 the police wouldn't allow的时态来看.should have done是对过去某一情形的虚拟.表示他本应该知道.(也就是说他不知道),"他本应该知道的"表示对实际情况虚拟,而实际情况是什么,是"他不知道",实际情况的时态时过去式,刚才也提到了"should have done"是对过去的虚拟,所以在后面谈到过去真实发生的情况时就不再虚拟了.而是用实际的时态,也就是过去时.

他应该知道警察不会允许这样做的，但是他却不知道。should have done过去应该做得事情，但是事实上却没有做，的意思。

should have done.

he should have known（他应该知道）主语和谓语
the police wouldn't allow it（警察不允许这样）是这句话的宾语，是宾语从句
but he didn't（但是他不知道）是与上一句衔接的另一句话
should have known 是对过去的虚拟，所以用did
关于虚拟，有不同时态的区别，你可以具体去看一下语法书...

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he should have known（他应该知道）主语和谓语
the police wouldn't allow it（警察不允许这样）是这句话的宾语，是宾语从句
but he didn't（但是他不知道）是与上一句衔接的另一句话
should have known 是对过去的虚拟，所以用did
关于虚拟，有不同时态的区别，你可以具体去看一下语法书

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C

他应该知道警察不会允许__but he didn't 但是他却不知道
大概就是这么个意思
他应该知道的..但是他不知道

should have done 是虚拟语气，表示过去本该做，而实际没做的事情。这实际上是过去时。如：
He should have booked the ticket yesterday.
他昨天本该定票的。
=He didn't book the ticket yesterday.
除了should 还有 would， could，和might等也可表示虚拟语气...

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should have done 是虚拟语气，表示过去本该做，而实际没做的事情。这实际上是过去时。如：
He should have booked the ticket yesterday.
他昨天本该定票的。
=He didn't book the ticket yesterday.
除了should 还有 would， could，和might等也可表示虚拟语气。
不知道能否帮助到你。

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should have known 本应知道，但实际并不知道。所以B